Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: E
Darker method: C
Equal score: 0.681976211367
Darker point darker score: not computed since the judgement is "E"
darker: E (eq: True, dd: None), confidence: 2, worker: A1PDSVMUP0CHRP
darker: 2 (eq: False, dd: True), confidence: 0, worker: A16S5BHQX20Y5A
darker: 2 (eq: False, dd: True), confidence: 2, worker: A37TNFY6Z2X3XX (marked invalid)
darker: E (eq: True, dd: None), confidence: 2, worker: AIKBREX7SEPXE
darker: E (eq: True, dd: None), confidence: 2, worker: A3HO0DT978POJ2
darker: E (eq: True, dd: None), confidence: 2, worker: A1TM1ZFU4OIPTD
(0: guessing, 1: probably, 2: definitely)